Display device performing charge sharing

Abstract

A display device includes: a charge sharing controller to generate the plurality of group switch control signals based on first bits of (K−1)th digital data groups and second bits of digital data groups. The (K−1)th digital data groups correspond to pixel values of a (K−1)th row of the display panel. The Kth data digital groups correspond to pixel values of a Kth row of the display panel. The charge sharing controller is configured to, with respect to each of the plurality of source line groups, activate each of the plurality of group switch control signals to perform the charge sharing in response to the first bits satisfying a first condition, and the first bits and the second bits satisfying a second condition. The first bits and the second bits are not compared to each other to output a count value.

What is claimed is: 
     
       1. A display device comprising:
 a display panel comprising a plurality of pixels which are connected to a plurality of gate lines and a plurality of source lines, and are arranged in a plurality of rows and a plurality of columns; 
 a plurality of switch circuits configured to electrically connect source lines, included in each of a plurality of source line groups of the plurality of source lines, to one another based on each of a plurality of group switch control signals to perform charge sharing; and 
 a charge sharing controller configured to generate each of the plurality of group switch control signals based on first bits of each of a plurality of (K−1) th  digital data groups and second bits of each of a plurality of K th  digital data groups, 
 wherein the plurality of (K−1) th  digital data groups correspond to pixel values of a (K−1) th  row of the display panel, the plurality of K th  data digital groups correspond to pixel values of a K th  row of the display panel, where K is a natural number greater than one, 
 wherein the charge sharing controller is configured to, with respect to each of the plurality of source line groups, activate each of the plurality of group switch control signals to perform the charge sharing in response to the first bits satisfying a first condition, and the first bits and the second bits satisfying a second condition, and 
 wherein the first bits and the second bits are not compared to each other to output a count value. 
 
     
     
       2. The display device of  claim 1 , wherein the charge sharing controller is configured to, with respect to each of the plurality of source line groups, deactivate each of the plurality of group switch control signals to not perform the charge sharing in response to the first bits not satisfying the first condition, or the first bits and the second bits not satisfying the second condition. 
     
     
       3. The display device of  claim 1 , wherein each of the plurality of switch circuits includes a plurality of first switches configured to perform the charge sharing; and
 wherein the charge sharing controller is configured to, with respect to each of the plurality of source line groups, activate each of the plurality of group switch control signals to turn on the plurality of first switches in response to the first bits satisfying the first condition, and the first bits and the second bits satisfying the second condition. 
 
     
     
       4. The display device of  claim 3 , wherein the charge sharing controller is configured to, with respect to each of the plurality of source line groups, deactivate each of the plurality of group switch control signals to turn off the plurality of first switches in response to the first bits not satisfying the first condition, or the first bits and the second bits not satisfying the second condition. 
     
     
       5. The display device of  claim 1 , wherein third bits are the first bits corresponding to pixels in selected columns among the plurality of columns, and fourth bits are the second bits corresponding to the selected columns; and
 wherein the charge sharing controller is configured to, with respect to each of the plurality of source line groups, activate each of the plurality of group switch control signals to perform the charge sharing corresponding to the selected columns in response to the third bits satisfying a third condition, and the third bits and the fourth bits satisfying a fourth condition. 
 
     
     
       6. The display device of  claim 5 , wherein the third bits and the fourth bits are not compared to each other to output the count value. 
     
     
       7. The display device of  claim 6 , wherein the selected columns are odd-numbered columns. 
     
     
       8. The display device of  claim 7 , wherein red pixels and blue pixels of the plurality of pixels are arranged in the odd-numbered columns, and green pixels of the plurality of pixels are arranged in even-numbered columns. 
     
     
       9. The display device of  claim 5 , wherein the charge sharing controller is configured to, with respect to each of the plurality of source line groups, deactivate each of the plurality of group switch control signals to not perform the charge sharing corresponding to the selected columns in response to the third bits not satisfying the third condition, or the third bits and the fourth bits not satisfying the fourth condition. 
     
     
       10. The display device of  claim 1 , wherein each of the plurality of switch circuits includes a plurality of first switches configured to perform the charge sharing; and
 wherein the plurality of first switches is configured to connect a reference source line, which is one source line of the source lines included in each of the plurality of source line groups, respectively to the other source lines of the source lines included in each of the plurality of source line groups, subject to the first condition and the second condition. 
 
     
     
       11. The display device of  claim 10 , further comprising a digital-to-analog converter configured to convert digital data to analog data, and
 wherein each of the plurality of switch circuits further include a plurality of second switches configured to connect the source lines included in each of the plurality of source line groups to the digital-to-analog converter. 
 
     
     
       12. The display device of  claim 11 , wherein the charge sharing controller is configured to determine whether the first condition and the second condition are satisfied in each of a plurality of row-unit time intervals for driving the display panel row by row. 
     
     
       13. The display device of  claim 12 , wherein a time point at which the plurality of first switches are turned on is after a time point at which the plurality of second switches are turned on in each of the plurality of row-unit time intervals. 
     
     
       14. The display device of  claim 1 , wherein each of the plurality of switch circuits connects two adjacent source lines among the source lines included in each of the plurality of source line groups. 
     
     
       15. A display device comprising:
 a display panel comprising a plurality of pixels which are connected to a plurality of gate lines and a plurality of source lines, and are arranged in a plurality of rows and a plurality of columns; and 
 a display driver integrated circuit configured to drive the display panel, the display driver integrated circuit comprising:
 a plurality of switch circuits configured to electrically connect source lines, included in each of a plurality of source line groups of the plurality of source lines, to one another based on each of a plurality of group switch control signals to perform charge sharing; 
 a data latch circuit configured to output a plurality of (K−1) th  digital data groups corresponding to pixel values of a (K−1) th  row of the display panel, and a plurality of K th  digital data groups corresponding to pixel values of a K th  row of the display panel, where K is a natural number greater than one; and 
 a charge sharing controller configured to generate each of the plurality of group switch control signals based on first bits of each of the plurality of (K−1) th  digital data groups and second bits of each of the plurality of K th  digital data groups, 
 
 wherein the charge sharing controller is configured to, with respect to each of the plurality of source line groups, activate each of the plurality of group switch control signals to perform the charge sharing in response to the first bits satisfying a first condition, and the first bits and the second bits satisfying a second condition, and 
 wherein the first bits and the second bits are not compared to each other to output a count value. 
 
     
     
       16. The display device of  claim 15 , wherein the charge sharing controller is configured to, with respect to each of the plurality of source line groups, deactivate each of the plurality of group switch control signals to not perform the charge sharing in response to the first bits not satisfying the first condition, or the first bits and the second bits not satisfying the second condition. 
     
     
       17. The display device of  claim 15 , wherein each of the plurality of switch circuits includes a plurality of first switches configured to perform the charge sharing; and
 wherein the charge sharing controller is configured to, with respect to each of the plurality of source line groups, activate each of the plurality of group switch control signals to turn on the plurality of first switches in response to the first bits satisfying the first condition, and the first bits and the second bits satisfying the second condition. 
 
     
     
       18. The display device of  claim 17 , wherein the charge sharing controller is configured to, with respect to each of the plurality of source line groups, deactivate each of the plurality of group switch control signals to turn off the plurality of first switches in response to the first bits not satisfying the first condition, or the first bits and the second bits not satisfying the second condition. 
     
     
       19. The display device of  claim 15 , wherein third bits are the first bits corresponding to pixels in selected columns among the plurality of columns, and fourth bits are the second bits corresponding to the selected columns; and
 wherein the charge sharing controller is configured to, with respect to each of the plurality of source line groups, activate each of the plurality of group switch control signals to perform the charge sharing corresponding to the selected columns in response to the third bits satisfying a third condition, and the third bits and the fourth bits satisfying a fourth condition. 
 
     
     
       20. The display device of  claim 19 , wherein the third bits and the fourth bits are not compared to each other to output the count value.